SK Square Drops 5.2% as Investors Cash In on SK Hynix ADR Rally — But Has the Stock's True Value Finally Been Unlocked?

Shares of SK Square, the holding company whose crown jewel is a roughly 20% stake in memory-chip giant SK hynix, slid to KRW 1,005,000 on August 7, pulling back sharply after a breathtaking rally that added more than 30% in just five trading sessions. The catalyst for that surge — SK hynix's planned listing of American Depositary Receipts on the Nasdaq — remains intact, raising a critical question: is this dip a buying opportunity or the end of a short-lived sugar rush? SK Square's Post-Rally Selloff: Is the Holding-Company Discount Finally Shrinking, or Was This Just a Trade?

Shares of SK Square slid 5.2% to KRW 1,005,000 on August 7, retreating after a stunning run that saw the stock rocket from roughly KRW 799,000 to over KRW 1,060,000 in just five sessions. The trigger for that rally — SK hynix's record-breaking Nasdaq ADR listing — hasn't changed. What's changed is that traders are locking in gains, forcing the market to ask whether SK Square's valuation gap has durably narrowed or simply overshot.

The Biggest Foreign Listing in History Lit the Fuse. SK hynix listed its ADRs on the Nasdaq on July 10, raising $26.5 billion in the largest U.S. share sale ever completed by a foreign company.

SK hynix holds about 60% of the high-bandwidth memory (HBM) market — the specialized chips powering AI data centers for Nvidia and Google. The company expects the listing to expand its investor base, "ultimately allowing its true corporate value to be properly evaluated." For SK Square, which exists primarily as a vehicle to own SK hynix, any uplift in the chipmaker's global profile lifts the floor under its own shares.

The "Holding-Company Discount" Is the Whole Ballgame. SK Square holds 146.1 million SK hynix shares, or 20.5% of the chipmaker. Historically, the market has valued SK Square at a steep markdown to that stake — a gap that averaged roughly 66% since its 2021 spinoff but narrowed to about 40% by early May 2026 under pressure from South Korea's Corporate Value-up Program. SK Square has shifted from a passive asset collector to an aggressive share repurchaser, funneling SK hynix dividends and portfolio exits into buybacks and cancellations. If the discount keeps shrinking, shareholders win even if SK hynix's stock flatlines.

Cash Flow Still Has to Travel a Long Road. SK Square's value is tied to SK hynix, but SK hynix earnings don't automatically become SK Square cash — they arrive only through dividends, stake sales, or collateralization.

Critics note that SK Square essentially "stands on one leg — Hynix" — and the heavier capital-allocation decisions may be recentered on SK Inc., the group's top holding company.

The Pullback Doesn't Erase the Structural Shift. Even after today's drop, SK Square trades roughly 25% above its July 29 close of KRW 799,000. Some of the rally was driven by fund-flow mechanics — Korean equity funds hitting single-stock ownership caps on SK hynix itself bought SK Square as a substitute, and "flow that arrives for a technical reason tends to leave for one too." The ADR listing, buyback program, and AI chip boom provide genuine long-term catalysts. The question is whether today's price already reflects them.